tongue in cheek
something said in humour, but with an act of being serious
say something in an ironic way
The latest movie I watched was a tongue in cheek look at the way the media tends to over-hype certain pieces of news.
One of the speakers at the business conference gave a tongue in cheek speech about the current economic condition of the country.
His comments were intended to be tongue in cheek, but his friends took it seriously and that started a huge argument.